Copia - The world's most advanced social eReading experience, now on Windows 7 Phone, lets you read and discuss the books you love with your friends and fellow readers. Anytime. Anywhere.
Experience a feature-rich, easy-to-use eReader that links to the Copia social reading community and marketplace at www.thecopia

Amazon Kindle is optimized for the Windows Phone, giving users the ability to read Kindle books on a beautiful, easy-to-use interface. You'll have access to over 750,000* books in the Kindle Store, including best sellers and new releases

Panda Reader - Notes:The primary text of the application Panda Reader is in Chinese.
Description:
Panda Reader is a free application that allows you to read eBooks on the Windows Phone 7, developed by NetDragon Websoft Inc

Blio - Don't just read books. Experience them.
Bringing books to life is about more than just recreating the words on the page. That's why we developed Blio.
Blio is smart enough to know that books are more than just words: there's style, presentation, and a world of color. And smart enough to know all of that enhances your reading experience